25397340 has 24 divisors (see below), whose sum is σ = 71112720. Its totient is φ = 6772608.

The previous prime is 25397329. The next prime is 25397341. The reversal of 25397340 is 4379352.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25397341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211585 + ... + 211704.

It is an arithmetic number, because the mean of its divisors is an integer number (2963030).

Almost surely, 2^25397340 is an apocalyptic number.

25397340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25397340 is an abundant number, since it is smaller than the sum of its proper divisors (45715380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25397340 is a wasteful number, since it uses less digits than its factorization.

25397340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423301 (or 423299 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 25397340 is about 5039.5773632320. The cubic root of 25397340 is about 293.9427441837.

The spelling of 25397340 in words is "twenty-five million, three hundred ninety-seven thousand, three hundred forty".